CTO & System Architect — Bangkok, Thailand
I architect scalable cloud systems, multi-tenant SaaS platforms, AI and chatbot solutions, high-concurrency telecom systems and enterprise integrations
20+ years designing systems for Thailand's enterprises, government and telecom — from multi-tenant SaaS platforms to AI solutions and 10K-concurrent messaging infrastructure. Technology that stays fast, secure and scalable.
Architect by craft,
builder at heart.
I'm Prathan Boonruang — a Chief Technology Officer and system architect based in Bangkok. For more than 20 years I've designed and led platforms for the public sector, enterprises and telecoms — from national HRMS and complaint systems to banking automation and telemedicine.
My craft spans the full stack: hybrid cloud architecture on AWS and Azure, multi-tenant SaaS engineering, AI & LLM integration, and high-concurrency telecom infrastructure. Today I lead technology strategy at One Digital Network and build WhereTeam — my own all-in-one business platform of 17+ systems serving 500+ organizations across Thailand.
B.Eng — Electrical Engineering (Computer), Mahanakorn University of Technology
Training — ARCUM Cloud Architecture · AI & Chatbot Development (LLM / RAG / NLP)
What I do best.
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01
Cloud & Infrastructure
Hybrid cloud on AWS + Azure — Kubernetes, Docker, auto scaling, load balancing and full observability with Grafana, Prometheus and Loki.
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02
SaaS Platform Engineering
Multi-tenant HRMS, ERP, CMS and budget platforms serving organizations nationwide — from architecture to subscription management.
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03
AI & Automation
Chatbot AI, LLM integration and RAG pipelines on pgvector — from health screening to compliance assistants and workflow automation.
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04
Telecom & High-Concurrency
SMS/VoIP gateways, Asterisk IVR and billing systems engineered for 10K+ concurrent requests — connected to carriers across the region.
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05
Technology Leadership & Strategy
Building and leading Dev, Cloud, DevOps and AI teams — technology roadmaps, agile delivery as Scrum Master, and mentorship that grows engineers into architects.
Systems in production.
I build systems that stay fast, secure and scalable long after launch.
The road so far.
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2021 — Present
Chief Technology Officer @ One Digital Network
Leading technology strategy across Dev, Cloud, DevOps and AI teams. Hybrid cloud on AWS + Azure, GitLab + Jenkins CI/CD, real-time integrations with Huawei Cloud and LINE — cloud performance up 45%, hosting cost down 30%.
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2020 — 2021
Technology Consultant @ B52 Public Company
Built the "Tanjaid" business-analytics dashboard, scaled abcpoint.com for high traffic, and designed real-time database sync plus POS–CRM API workflows.
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2018 — 2021
Lead Developer · Mobile & Backend Architect @ DNAMaker
BDMS Training mobile app (React Native + Node.js + Laravel), automated document-scanning for Siam Commercial Bank, and a multi-tenant CMS SaaS platform.
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2017 — 2021
System Analyst & Lead Developer @ ZD Marketing & Consultant
Designed HRMS, ERP and Budget SaaS on multi-tenant architecture — deployed for thethaibar.or.th and stin.ac.th — plus the tas.go.th public-complaint app, API gateway and load balancing.
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2014 — 2017
Senior Developer · Technical Lead @ Research for Life
Epub3 Reader, vcharkarn.com and scimath.org. Introduced CI/CD to the organization — deploy time dropped from 2 days to 2 hours.
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2010 — 2013
Co-founder · IT Director @ 1stnode
Co-founded a web and systems development agency — client websites and business systems, e-learning platforms for Rajinibon School and Sripatum University, e-commerce, CMS and travel e-books.
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2010 — 2012
System Developer @ SecondVoice Inc (USA)
VoIP systems, voicemail and Fax-over-IP (GFax); designed an Asterisk IVR serving 1,000+ concurrent lines.
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2009 — 2010
Co-founder & CTO @ Mobile Innovation Content & Technology
SMS gateway handling 10,000+ concurrent requests per second, carrier APIs for AIS, DTAC, TrueMove, LaoTel and Metfone, plus subscription and billing systems.
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2005 — 2009
IT Manager · Senior Developer @ ANS Wireless
SMS gateway, call center, Asterisk IVR and VoIP systems — high-concurrent messaging engineered for 10K+ connections, backed by server farms with failover and monitoring clusters.
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2001 — 2005
Board Member · Development Head @ Global Evolution Technology
Messaging and content-delivery platforms — SMS gateway, ringtones, live SMS voting — operating in Cambodia and Laos.
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2000 — 2005
Web & Game Developer @ Sodamag.net
Where it all started: sodamag.net, shockmanager.com and hunsa.com — online MMORPG games and early SMS gateway systems.
Working with me.
Quick answers for founders, product teams and organizations considering an engagement.
Are you available for hire or consulting?
Yes — I take consulting engagements, fractional CTO roles, system architecture reviews and custom development projects. Email prathan@whereteam.com or call 094-451-6247; I usually reply within 24 hours.
What services do you offer?
Technology strategy and roadmaps, cloud architecture on AWS and Azure, multi-tenant SaaS development, AI/LLM integration (RAG, chatbots), custom web and mobile development, system integration, and DevOps/CI-CD setup.
How much experience do you have?
More than 20 years. I'm CTO at One Digital Network, built WhereTeam — an all-in-one business platform serving 500+ organizations with 50K+ daily users — and previously delivered systems for government agencies, universities, a major Thai bank and telecom carriers across Southeast Asia.
Where are you based and do you work internationally?
Based in Bangkok, Thailand (ICT, UTC+7). I work remote-first with teams worldwide, in English and Thai.
What is your core tech stack?
AWS and Azure hybrid cloud, Kubernetes, Docker, PostgreSQL, Supabase, Node.js, Laravel, Python/FastAPI, React and React Native — plus Asterisk/VoIP for telecom-grade systems.
Let's build something
worth remembering.
Consulting, system architecture, or a fractional CTO partnership? My inbox is always open — I usually reply within 24 hours.
Engagement types
- Consulting
- Fractional CTO
- System Architecture
- Custom Development
- AI & LLM Integration
- Cloud Migration
- DevOps Setup